1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Sonja [21]
3 years ago
8

A random sample of n=25 individuals is selected from a population with μ=20 , and a treatment is administered to each individual

in the sample. After treatment, the sample mean is found to be M= 22.2 with SS= 384.
a. How much difference is there between the mean for the treated sample and the mean for the original population? (Note: In a hypothesis test, this value forms the numerator of the r statistic.)

b. If there is no treatment effect, how much difference is expected between the sample mean and its population mean? That is, find the standard error for M. (Note: In a hypothesis test, this value is the denominator of the t statistic.)

c. Based on the sample data, does the treatment have a significant effect? Use a two-tailed test with α= 0.05.

Mathematics
1 answer:
zheka24 [161]3 years ago
4 0

Answer:

a) how much difference in number of mean is 2.2

b) standard error of sample mean = 0.8

c) the test statstistical value is greater than the critical value ,hence we reject the null hypothesis. we can conclude that the treatment thus have a significant effect

Step-by-step explanation:

You might be interested in
Does a=2.1 b=7.2 c=7.5 form a right triangle
Anna007 [38]

Answer:

Yes

Step-by-step explanation:

If the longest side squared is equal to the sum of the squares on the other 2 sides then they form a right triangle

longest side = 7.5

7.5² = 56.25

2.1² + 7.2² = 4.41 + 51.84 = 56.25

Thus the 3 values form a right triangle.

6 0
3 years ago
Read 2 more answers
Events A and B are mutually exclusive. Suppose event A occurs with probability 0.36 and event B occurs with probability 0.31. Co
Alekssandra [29.7K]

Answer:

Events A and B are dependent

Step-by-step explanation:

If A and B are two events such as A and B are dependent then

P(A∩B)  P(A) P(B)

An event A will occur with probability 0.4 that is  

An event B will occur with probability 0.6 that is  

The probability that both A and B will occur is 0.20 that is P(A∩B) = 0.20

Therefore,

P(A∩B)  P(A) P(B)

So,

events A and B are dependent

4 0
4 years ago
Read 2 more answers
Help me find the figure , area formula and graph the dots and find the area
Advocard [28]

Answer:

Looking at the given points we know that it is going to be a triangle because it only have 3 points.  Therefore the figure is a triangle and the area formula would be A=\frac{1}{2}*b*h.

You can look at the attached graph and what we see is that our height of the triangle is from y=-3 to y=4 which means that our height is 7 units high.  We can also see that our base starts at x=-4 and ends at x=4 making us have a base of 8 units.

<u>We then plug in the values and solve</u>

A = \frac{1}{2}*7\ units * 8\ units

A = \frac{1}{2}*56\ units^2

A = 28\ units^2

Therefore, the area of our triangle is 28\ units^2

Hope this helps!  Let me know if you have any questions

4 0
2 years ago
Which is equivalent to the expression<br> (2x = 3x) + (3x + 2x + 3)?
vekshin1

Answer:

add and the take the parathesis out and there you have ur answer

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
SUMMARY: how can you use mapping rules to find rotations of objects at 90, 180, and 270 degrees?
Levart [38]

A rotation is an isometric transformation that turns every point of a figure through a specified angle and direction about a fixed point.

To describe a rotation, you need three things:

Direction (clockwise CW or counterclockwise CCW)

Angle in degrees

Center point of rotation (turn about what point?)

The most common rotations are 180° or 90° turns, and occasionally, 270° turns, about the origin, and affect each point of a figure as follows:

Mark me as brainliest! :D Hope it helps

6 0
3 years ago
Other questions:
  • Solve the system of linear equations below.
    10·1 answer
  • Write a linear factorization of the function.<br> f(x) = x4 + 16x2
    8·2 answers
  • Glacier State Bank pays 6% interest, compounded daily. After finding the daily interest rate (to the nearest millionths place) f
    8·1 answer
  • In 3 years, ron will be 2/3 the age of John. The sum of their present age is 44
    7·1 answer
  • Please look at the attached image. Really need Help!! Who ever find answer first will get brainily.
    14·2 answers
  • A company's profits for a week are as follows:
    5·2 answers
  • Explain to me in words how you would find the slope of this line and your answer
    7·1 answer
  • two sides of a triangle measure to 20cm and 30cm. Which of the following could be measure by the third side
    8·1 answer
  • What is the missing numerator?
    9·1 answer
  • Explain why it is almost impossible to end inflation and high unemployment at the same time PLEASE HELP ME I'M FALLING IN SOCIAL
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!